Could it be the sight or the smell of the burger? Or is merely talking about it enough to push you over the edge? Or perhaps it's what's in your cup that makes you cave. Find out what triggers you to eat not so good for you foods.

While there have been plenty of studies on the health benefits of coffee — including a boost in your workout performance — there are also negative effects of drinking too much coffee. So just how much is too much? And how real are the health claims?